A man or woman who can make tea to such a high degree, that (s)he is only comparable to being a messiah of the art. (S)He can make the strongest of tea haters into believers. (S)He believes in the majesty of tea and puts all their soul into every cup. Also believes that tea can solve many if not most problems.

guy/girl: Sorry, I don't like tea.
teasus: just take one sip of tea, please, trust me.

he/she takes a sip
guy/girl: this...this is really good! how'd you make this taste so good? I've never had tea like this.
teasus: All tea is good, but not all makers have real passion for it. I'm glad you liked it. Teasusbe with you.
guy/girl: And also with you.